Electrically heated tool



Nov. 21, 1939. B. F. BRUGGERMAN 0,6

ELE

LY HEATED TOOL Filed Feb. 1, 1939 if 1 1e 9 Q, v attorney Patented Nov. 21, 1939 UNlTED STATES WAT-EMT OFFlCE 2,180,665 ELECTRICALLY HEATED TOOL Bertrand F. Bruggerman, Los Angeles, Calif.

Application February 1, 1939, Serial No. 254,092

6 Claims. (01. 219-26) This invention relates to improvements in elecwires 28 of conduit 52 which project intothe trically heated tools, and more particularly to counterbore 56 are unsheathed and spread outhand tools for soldering, welding and the like wardly against the wall of the counterbore vith having an electrically heated working head such the extremities 2! thereof preferably extending as a carbon tip. beyond the counterbore outside the handle Ill It An object of the invention is to provide a defor a slight distance for a purpose hereinafter vice wherein the various parts thereof may be apparent. readily and securely joined together without the A hollow sleeve or shank 22 formed of brass or necessity as heretofore of using screws or any other suitable material is of slightly less diameter lorlother extraneous fastening means and which is than the diameter of the counterbore it. When 1. otherwise of exceedingly simple construction and securing together sleeve 22 and the handle iii, the inexpensive in cost of manufacture. conduit wires '22 may be arranged as shown in Another object is to provide a tool of the above 2 and the tapered end 2 of sleeve 22 passed incharacter having parts thereof air-cooled and side the flared wire ends 2i, inserted in the counl61- arranged so that heat from the working head does terhore i5, forcing the wires 22 further outwardly not interfere with handling or manipulation of against the wall of the counterbore, whereupon the tool. More particularly, the invention con the wires 2% become tightly wedged between the prehends the provision of a carbon tip supporting sleeve 22 and counterbore it to make emcient sleeve or shank which is adapted to adjustably current conducting contact with the metal sleeve and frictionally support the tip in a manner to or shank 22 and to serve as a packing means fric- ..v form a circumferential air pocket around the tip tionally holding the sleeve 22 in the counterbore concentric with the inner wall of the sleeve. of the handle. Shoulder 58 operates as a stop Other and further objects and advantages of for the inserted sleeve 22 and, if desired, the sleeve the invention will become apparent from the folmay be driven into the counterbcre so that the 5 lowing detailed explanation taken in conjunction wires 28 are tightly pressed between the tapered 25 with the accompanying drawing, wherein a preend 24 of the sleeve 22 and the shoulder [8. In ferred embodiment of the principles of the inventhe above novel assembly, the sleeve is securely tion has been selected for exemplification. held in the handle without resorting to the use In the drawing: of any extraneous fastening means such as con- Fig. l is a side elevational view of a tool as conventional screws or the like, and the electric 30 templated by the present invention; current conduit when distorted in the manner de- Fig. 2 is an enlarged fragmentary section of scribed is caused to serve the two-fold function of the handle and conduit as shown in Fig. 1 but conducting current to the metal sleeve and fricprior to association therewith of the carbon tip tionally holding the sleeve in the handle.

supporting sleeve; The free end 26 of the sleeve 22 is tapered in- 35 Fig. 3 is an enlarged fragmentary section simiwardly, and tapering thereof is facilitated by the lar to Fig. 2 but having the carbon tip supporting provision of slots 33 arranged axially at the end sleeve associated therewith; of the sleeve which are primarily intended for a Fig. 4 is an enlarged fragmentary section of the purpose which will hereinafter appear. Provided free end of the sleeve of Figs. 1 and 3, showing in the body portion of the sleeve and preferably 4 the manner of supporting the carbon tip; and at a point proximate to the free or outer end 26 Fig. 5 is a sectional View of the sleeve illustrated is an inwardly extending means which may take in Fig. 4 and taken on the line 5-5 of Fig. 4, the form of inwardly projecting protuberances 28 looking in the direction of the arrows. pressed from the wall of the sleeve. The extremi- Referring more particularly to the drawing, ties 29 of the indentations or protuberances 28 45 wherein like numerals refer to like parts, H3 repare in axial alignment with the inner edges 21 resents an electrically insulated handle which of the sleeve end 26 so that, when the carbon tip may be of any suitable configuration and size and or other working head 32 is inserted in the sleeve receiving a sheathed multi-wire electric current 22, it is engaged by the surfaces 2'! and 29 at a conduit I2 in bore 14 provided preferably cenp u ty of points on its circumference a fric- 50 trally and longitudinally of the handle It and tionally supported in the sleeve 22 to form a through which the conduit is inserted. Coaxial Space concentric with the internal wall of the of the bore I4 is a counterbore 16 providing an sleeve 22. Communicating w this Space are enlarged mouth and forming a shoulder IS inthe slots 36 disposed in the end 26 of the sleeve 7 side the handle. The free and portions of the and, to imp Structural Strength as Well as 55 efiiciently distribute the flow of air therethrough, the slots 30 are preferably positioned alternately of the indentations 28. This space serves to effectively insulate the sleeve from the intense heat 5 emanating from the carbon tip during operation of the tool, while at the same time the tip 32 is adjustably secured in the sleeve 22 by frictional engagement.

It is understood that my invention is not limited to the particular construction herein illustrated and described but includes such modifications thereof, including arrangement of parts, omissions or additions, and selection of materials, as fall within the scope of the following claims.

5 I claim:

1. An electric soldering device having an electrically insulated handle, an electric current conducting hollow sleeve supported at one end by said handle, and a carbon tip coaxially supported 20 within the other end of said sleeve and spaced from the interior walls thereof to form a heat insulating air space between the carbon tip and the sleeve, and a slotted portion in said sleeve communicating said space with the atmosphere.

2. An electric soldering device having an electrically insulated handle, a hollow sleeve supported at one end by said handle, inwardly extending electric current conducting means provided at a plurality of spaced points in the length 30; of said sleeve and integral with said sleeve, and a carbon tip received in the other end of said hollow sleeve adjustably supported therein as a plurality of spaced points in its length by frictional engagement with said inwardly extending electric 331 current conducting means.

3. An electric soldering device having an electrically insulated handle, an electric current conducting hollow sleeve supported at one end by said handle and having a series of axially ar- -ranged slots at its free end, the free end of said sleeve being tapered inwardly and a body portion of said sleeve proximate its free end being indented inwardly, and a carbon tip supported within said hollow sleeve and spaced from the walls thereof by engagement with the inwardly tapered free end and the inwardly indented body portion, said slots communicating said space with the atmosphere.

4. An electric soldering device having an electrically insulated handle, an electric current conducting hollow sleeve supported at one end by said handle and having a series of axially arranged slots at its free end, a series of inwardly projecting protuberances provided on the body portion of the sleeve and circumferentially arranged alternately of said slots, and a carbon tip supported within said hollow sleeve and spaced from the walls thereof by engagement with the inwardly projecting protuberances, said slots communicating said space with the atmosphere.

5. An electric soldering device having an electrically insulated handle, an electric current con-- ducting hollow sleeve supported at one end by said handle and having an inwardly tapered free end, a plurality of inwardly projecting protuberances provided on the body portion of said sleeve, a carbon tip telescoped within said sleeve, said tip being frictionally held therein by engagement with said protuberances and said tapered end and spaced from the remainder of said sleeve, and a slotted portion in the wall of said sleeve opening into said space.

6. An electric soldering device having an electrically insulated handle, an electric current conducting hollow sleeve sup-ported at one end by said handle and having an inwardly tapered free end, a series of inwardly projecting protuberances provided on the body portion of said sleeve, and a carbon tip telescoped within said sleeve, said tip being frictionally held therein by engagement with said protuberances and said tapered end and spaced from the remainder of said sleeve.

BERTRAND F. BRUGGERMAN. 

